The chemical change of four resole type phenol-formaldehyde resins in curing process was studied by infra-red spectroscopy.
用红外光谱法研究了四种热固性酚醛树脂在固化过程中的化学变化。
The chemical change of four resole type phenol-formaldehyde resins in curing process was studied by infra-red spectroscopy.
用红外光谱法研究了四种热固性酚醛树脂在固化过程中的化学变化。
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